By simulating the future atmosphere, scientists hope to understand whether trees will continue to act as the lungs of the ...

Now known as Prometheus, the tree was found to be nearly 5,000 years old. That means Prometheus came into existence around the time humans were exiting the Stone Age and beginning to work with bronze.

Discover the awe-inspiring world of the most ancient trees with our list of the 9 most ancient known trees on Earth.

Volcanic eruptions and cold summers leave lasting marks in the wood of northern trees, unlocking the secrets of past climate extremes.

In 1964, graduate student Donald Rusk Currey asked for permission to cut down a tree growing on Wheeler Peak in Nevada's Great Basin National Park. Though there are different accounts on the ...

Scientists in northwest Wyoming found remnants of an ancient forest, frozen in ice on a barren tundra in northwest Wyoming.